Critical hits are a straight line

Critical hits are the part of Warframe’s damage model that looks the most complicated and turns out to be the simplest. There are tiers, there are colours, there is a threshold at 100% and another at 200% — and none of it survives being written down properly.

What comes out the other side is one multiplication with no breakpoints in it. That changes how you build.

How Warframe damage actually works places the critical layer in the pipeline and says what it does. This guide is the arithmetic underneath it.

Two numbers on the card

The multiplier is the one people misread. 3.0× means the hit deals three times the damage, not three times more. A 100-damage shot that crits deals 300, not 400.

Critical chance mods are additive with each other and then multiply the base once, like every other percentage mod. Point Strike at +150% turns 38% into 38 × 2.5 = 95% — one mod, and the weapon is nearly always critting.

Where the naive reading breaks

The obvious model is a coin flip: 38% of the time you deal ×3, the rest of the time ×1. Average it out and you get 1.76.

That is correct, and it stops being correct at 100%.

If the model were only a coin flip, crit chance past 100% would be worth nothing, and builds that stack it far past that point would be wasting mods. They are not.

The tiers

The surplus promotes a hit one tier higher. A weapon at 133% chance crits on every shot, and a third of those crit at the next tier up.

The tiers are named for the colour of the damage number, and the multiplier at tier n is:

And then it all cancels

A weapon between two tiers spends part of its shots on each, so its average is the two tiers mixed in proportion. Write that out, with n the tier you have reached and f the fraction past it:

average = [1 + n(m−1)](1−f) + [1 + (n+1)(m−1)]f
        = 1 + (m−1)[n(1−f) + (n+1)f]
        = 1 + (m−1)(n + f)
        = 1 + chance × (multiplier − 1)

The tier index disappears.

The line, drawn

Here is the same statement as a picture. The coloured bands are the tiers, the dashed lines are the boundaries everyone builds around, and the line walks through both without noticing.

The numbers, from our own engine

Critical chance	Tier reached	Average multiplier	Damage from 100
38%	yellow	×1.76	176
95%	yellow	×2.90	290
100%	orange	×3.00	300
133%	orange	×3.66	366
200%	red	×5.00	500
300%	red	×7.00	700

Look at the step from 95% to 100%. The colour changes, a tier boundary is crossed, and the number does nothing remarkable: +0.10, exactly what the previous five points of chance were worth.

Those figures come out of computeWeapon(), the same function that fills the build planner. They were read from it rather than worked out on paper.

What it means when you build

1. Crit chance past 100% is not wasted

   A point above the line is worth precisely what a point below it was worth. Builds that commit fully to crit are not overshooting.

2. Chance and multiplier appear as a product

   In chance × (multiplier − 1), doubling either one doubles the bonus. Which to add is decided by what the weapon is short of, not by a rule — on a weapon with low base chance, chance is what is missing; on one that already crits every shot, the multiplier is.

3. The colour is not a target

   Building to "reach red" buys nothing by itself. The average only ever sees the chance and the multiplier; the colour is a consequence of where the chance landed, not a reward for landing there.

A worked example on the Rubico Prime, each step read from the engine:

Build	Chance	Multiplier	Average
Bare	38%	3.00×	×1.76
+ Point Strike	95%	3.00×	×2.90
+ Vital Sense	95%	6.60×	×6.32

Two mods, and the weapon’s average output is 3.6 times what it started at. Neither of them crossed a tier boundary.

Where it sits in the damage calculation

The critical layer resolves last, on the total for one pull of the trigger. Which is why multishot and critical mods reinforce each other rather than compete: the crit multiplier is applied to the whole volley, including the extra projectiles multishot added.

Two things worth being honest about